Freezing Pillows Does Not Kill Head Lice

Putting pillows in the freezer does not reliably kill head lice.

Why Freezing Fails

• Lice and nits (eggs) tolerate cold; home freezers (~−18°C/0°F) may not reach lethal temperature long enough.
• Nits are especially resistant; require sustained −20°C for hours—unachievable in typical conditions.
• Lice survive off-host only 24–48 hours (need blood meals); environmental treatment is secondary.

Effective Lice Management

1. Treat the person: FDA-approved pediculicides (permethrin 1%, pyrethrins, ivermectin lotion, spinosad, malathion) per label. Repeat per schedule.
2. Wet-comb: Conditioner + fine-tooth nit comb every 2–3 days × 2 weeks. Removes live lice and nits mechanically.
3. Environmental: Wash bedding/clothing in hot water (≥55°C/130°F) + high-heat dry. Vacuum furniture/car seats. Bag non-washables 2 weeks (optional).
4. Check/treat household contacts simultaneously.

What Doesn't Work

• Freezing, mayo, olive oil, essential oils, kerosene, vinegar, hair dye.
• "Natural" remedies without evidence.

Focus on the head, not the pillow. Consistent combing + pediculicide clears infestations.